Thermo-Electric Detection of Early Fatigue Damage in Metals

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dc.contributor.author Nagy, Peter
dc.contributor.author Hu, Jiangtao
dc.date 2018-02-14T08:30:04.000
dc.date.accessioned 2020-06-30T06:49:12Z
dc.date.available 2020-06-30T06:49:12Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 1998
dc.date.issued 1998
dc.description.abstract <p>There are numerous nondestructive inspection methods which can be used to detect and quantitatively characterize advanced fatigue damage following crack initiation. However, crack nucleation occurs at a much smaller microstructural scale following a more or less extended period of gradual material degradation which remains beyond the reach of known eddy current, ultrasonic, and other inspection methods. Before crack initiation, fatigue degradation remains an elusive process leading to distributed crystal defects on the scale of individual grains and grain boundary imperfections. This gradual evolution of early fatigue damage first results in increasing dislocation density, formation of slip bands, microplasticity, cold work, etc., then leads to crack nucleation at multiple sites. Following crack nucleation the growing microcracks ultimately coalesce into larger detectable fatigue cracks, but current NDE methods cannot detect the often quite serious preexisting fatigue damage in the material before this point.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/qnde/1998/allcontent/204/
dc.identifier.articleid 3796
dc.identifier.contextkey 5810882
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath qnde/1998/allcontent/204
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/61367
dc.language.iso en
dc.relation.ispartofseries Review of Progress in Quantitative Nondestructive Evaluation
dc.source.bitstream archive/lib.dr.iastate.edu/qnde/1998/allcontent/204/1998_Nagy_ThermoelectricDetection.pdf|||Fri Jan 14 22:24:26 UTC 2022
dc.source.uri 10.1007/978-1-4615-5339-7_204
dc.title Thermo-Electric Detection of Early Fatigue Damage in Metals
dc.type event
dc.type.genre article
dspace.entity.type Publication
relation.isSeriesOfPublication 289a28b5-887e-4ddb-8c51-a88d07ebc3f3
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